We're not sure if we'll be doing this. The tome worked out well enough for Wrath of the Lich King as an experiment, but so much of the experience we spent a lot of time and effort shaping in Pandaria is negated by flying. In addition to the upcoming reputation changes for alts (when a character on the account hits Revered), we'll consider other methods of potentially speeding up the leveling process for alts, but we don't think "allow flying" is necessarily the best answer.